Bulk Current Injection Probes (BCI Probes)

A Bulk Current Injection (BCI) Probe is a high-power current transformer designed to inject intense RF interference directly into a cable harness. Unlike monitoring probes, which “listen” to signals, BCI probes are “transmitters” used to test a device’s immunity by simulating the high-frequency currents that would be induced by nearby radio towers, radars, or other heavy electronic equipment.

Why Choose a BCI Probe?

High Power Handling: These probes are constructed with specialized ferrite cores and heavy-duty windings to handle the high-wattage output (often 50W to 100W+) from RF amplifiers without saturating or overheating.
Controlled Interference: They allow you to test "Immunity" without needing a full anechoic chamber or large antennas, as the energy is coupled directly into the cables rather than radiated through the air.
Standard Compliance: BCI testing is a mandatory requirement for many industries—specifically ISO 11452-4 (Automotive), MIL-STD-461 (Military), and RTCA/DO-160 (Aerospace).
Wide Frequency Coverage: Professional BCI probes (like those from Tekbox) typically cover the critical range from 10 kHz up to 400 MHz or even 1 GHz, where cable-coupled interference is most likely to cause system failures.

Core Applications

Automotive Immunity Testing: Injecting noise into a vehicle's wiring loom to ensure that critical systems like the ECU, ABS, or Airbags do not malfunction when the car drives past a powerful radio transmitter.
Aerospace and Defense: Simulating the "High-Intensity Radiated Fields" (HIRF) that aircraft electronics encounter from ground-based radar or onboard communication systems.
Component-Level Diagnostics: Identifying which specific wire in a multi-conductor cable is the "entry point" for interference, allowing engineers to add targeted shielding or filtering.
System Robustness Verification: Testing industrial control systems to ensure they remain stable in electrically "noisy" environments, such as factories with large VFDs (Variable Frequency Drives).

SKUImageFrequency RangeCoupling LossMax. RF Input PowerAperture DiameterOuter DimensionsStandardStockPrice
TBBCI1-200K280TBBCI1 200K280 SIDE150 kHz – 230 MHz8 dB typical50W continuous
100W short time		27 mm92 x 76 mmBCI probe for IEC / ISO 61000-6-41£1,391.00
TBBCI1-800K420TBBCI1 200K280 SIDE1 MHz – 400 MHz5 dB typical50W continuous
100W short time		27 mm92 x 76 mmBCI probe for IEC / ISO 11452-41£1,391.00
TBBCI1-300K420TEKBOX TBBCI1 300K420 HV TelonicUK300 kHz – 400 MHz5 dB typical50W continuous
100W short time		27 mm92 x 76 mmBCI probe for ISO 11452-4; MIL-STD-461
CS114, GJB 151B-2013, DO-160		On Backorder£1,419.00
TBBCI1-CALTEKBOX Calibration Fixture TBCI1 TelonicUK150 kHz – 400 MHz-500 W-200 × 150 × 140 mmBCI probe calibrator for IEC / ISO 61000-6-4
IEC / ISO 11452-4		1£725.00
  • TBBCI1 200K280 SIDE

    TBBCI1-200K280 SNAP-ON BULK CURRENT INJECTION PROBE

    £1,391.00 (£1,669.20 inc. VAT)

    1 in stock (can be backordered)

    Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)

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  • TBBCI1 200K280 SIDE

    TBBCI1-800K420 SNAP-ON BULK CURRENT INJECTION PROBE

    £1,391.00 (£1,669.20 inc. VAT)

    1 in stock (can be backordered)

    Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)

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  • TEKBOX TBBCI1 300K420 HV TelonicUK

    Tekbox TBBCI1-300K420 Snap-On Bulk Current Injection Probe

    £1,419.00 (£1,702.80 inc. VAT)

    Available on back-order

    Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)

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  • TEKBOX Calibration Fixture TBCI1 TelonicUK

    Tekbox TBBCI1-CAL Bulk Current Injection Probe Calibration Fixture

    £725.00 (£870.00 inc. VAT)

    1 in stock (can be backordered)

    Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)

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